Firmware Updates for STN2120

Here you will find short summaries of changes between the different firmware revisions. Developers should read the detailed changelog found inside the respective update archive. To install an update, download and extract the archive, then run StnFirmwareUpdater.exe.

Latest Version 5.5.2

Release Date: June 3, 2020
Level of Importance: Recommended

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This release fixed a serious bug:

  • Fixed lack of ability to transmit after CAN ERROR
See stn2120-changelog.txt inside the archive for detailed descriptions of the changes.




Version 5.5.1

Release Date: June 2, 2020

This release fixed a serious bug:

  • Fixed FATAL ERROR when using multi-frame reception on CAN
See stn2120-changelog.txt inside the archive for detailed descriptions of the changes.




Version 5.5.0

Release Date: May 28, 2020

The release added a change:

  • ELM 1.4b compliance
See stn2120-changelog.txt inside the archive for detailed descriptions of the changes.




Version 5.4.1

Release Date: May 21, 2020
Level of Importance: Recommended

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This major release fixed several bugs including:

  • Stopped premature timeout on CAN multi-frame reception
  • Fixed printing error when message reception was interrupted

The release also added several new features and changes including:

  • Added support for PP 2C bit 4 (8/7 CAN)
  • CAN driver improvements
  • "STOPPED" is now printed exiting all monitoring modes
See stn2120-changelog.txt inside the archive for detailed descriptions of the changes.




Version 5.0.0

Release Date: September 9, 2019
Level of Importance: Recommended

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This major release fixed several bugs including:

  • Fixed CAN extended addressing bug when auto-formatting turned off
  • ATTA now works when used with ATCEA
  • STCFCPA now checks if a flow control address pair already exists
  • Fixed “set protocol” reopening current protocol if invalid protocol

The release also added several new features and changes including:

  • Added periodic messaging commands
  • Added command for custom ISO-14230 fast init
  • J1939 now accepts targeted or broadcast acknowledgements
See stn2120-changelog.txt inside the archive for detailed descriptions of the changes.




Version 4.5.0

Release Date: April 4, 2018
Level of Importance: Recommended

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This major release fixed several bugs including:

  • STPX would cause INTERNAL ERROR under certain conditions
  • ATH1 would print an extra byte for messages received on J1939 and ISO 15765
  • ATKW command could return invalid key bytes
  • STP, ATSP, ATTP commands could reset protocol parameters

The release also added several new features and changes including:

  • Support for message transmission timeout
  • Support for PP 1A, 1B
  • Improved automatic protocol detection for CAN protocols
  • Reduced deaf time after sending a CAN message
See stn2120-changelog.txt inside the archive for detailed descriptions of the changes.




Version 4.3.1

The release fixed the following bug:

  • STM command cleared default filters on exit

This release also added several changes including:

  • Removed all retries for CAN bus errors on initial transmission
  • Changed STPX 'x' parameter for ISO 9141
  • Improved partial protocol detection for non-OBD-II systems
  • Improved automatic protocol detection

See stn2120-changelog.txt inside the archive for detailed descriptions of the changes.




Version 4.3.0

Initial release